diff --git a/frc971/control_loops/python/drivetrain.py b/frc971/control_loops/python/drivetrain.py
index c720558..e2b42f5 100755
--- a/frc971/control_loops/python/drivetrain.py
+++ b/frc971/control_loops/python/drivetrain.py
@@ -67,7 +67,7 @@
     # Mass of the robot, in kg.
     self.m = 68
     # Radius of the robot, in meters (from last year).
-    self.rb = 0.617998644 / 2.0
+    self.rb = 0.9603 / 2.0
     # Radius of the wheels, in meters.
     self.r = .0515938
     # Resistance of the motor, divided by the number of motors.